CN201266868Y - Impedance composite type noise reducer - Google Patents
Impedance composite type noise reducer Download PDFInfo
- Publication number
- CN201266868Y CN201266868Y CNU2008201520713U CN200820152071U CN201266868Y CN 201266868 Y CN201266868 Y CN 201266868Y CN U2008201520713 U CNU2008201520713 U CN U2008201520713U CN 200820152071 U CN200820152071 U CN 200820152071U CN 201266868 Y CN201266868 Y CN 201266868Y
- Authority
- CN
- China
- Prior art keywords
- filter element
- muffler
- impedance composite
- resistance filter
- composite muffler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Exhaust Silencers (AREA)
Abstract
The utility model discloses an impedance combined muffler which relates to a muffler, in particular to a combined muffler used for a generating set. The impedance combined silencer comprises a resistive sound-absorbing element and is characterized by also comprising a reactive filter element; and the reactive filter element comprises a plurality of joints of expanding chambers and at least one joint of expanding chamber is internally provided with the resistive sound-absorbing element. As the resistive sound-absorbing element and the reactive filter element are organically combined, the combined muffler can be adapted to the requirements of the wider frequency range; in addition, the reactive filter element avoids the easy-damage environment of high-temperature steam and oil stains and the like of a resonant cavity well, therefore, the combined muffler can be applied to various generating sets which adopt the internal combustion engine as the power source.
Description
Technical field
The utility model relates to a kind of muffler, is specially a kind of muffler that is used on the generating set.
Background technology
When human body is in noise circumstance, not only influence operating efficiency, also harmful healthy, particularly the time near generating set equipment.Muffler is that a kind of air communication that allows is crossed and the device of attenuate acoustic noise.The quality of muffler performance not only influences the size of the noise of generating set equipment, and performances such as the power of generating set, oil consumption, moment of torsion are all had considerable influence.
In the configuration of the generating set of routine, the muffler of a general configuration has two kinds: a kind of is reactive muffler, and a kind of is dissipative muffler.Reactive muffler is simple in structure, and high temperature resistant gasproof body corrodes, and good low frequency acoustic attenuation performance is arranged, but noise elimination frequency band is narrow, can only be used for automobile engine and other piston-engined air inlet and exhaust outlet.Dissipative muffler can be eliminated the noise in the medium-high frequency scope of broad, especially high frequency sound wave there is outstanding noise elimination effect, but at high-temperature vapor and sound-absorbing material there is in the gas of corrosiveness useful life shorter, and easily reduced or lose the noise elimination effect by obstruction such as carbon deposit, greasy filth.
The utility model content
The purpose of this utility model is the weak point at existing generating set muffler existence, and dissipative muffler and reactive muffler are organically combined, and a kind of novel impedance composite muffler that has both acoustic characteristicses concurrently is provided.
The problem that the utility model solved can realize by the following technical solutions:
Impedance composite muffler comprises resistive sound absorbing element, it is characterized in that, also comprises a resistance filter element, and described resistance filter element comprises plural number joint expansion chambers, at least one joint expansion chambers resistive sound absorbing element is housed.The resistive sound absorbing element of impedance composite muffler is used to reduce the noise of medium-high frequency, and the resistance filter element is used to reduce the noise of medium and low frequency, has had both acoustic characteristicses concurrently.
Described resistance filter element also is provided with resonant cavity, and resonant cavity and plural number joint expansion chambers begin to be connected into successively a resistance filter element cavity from resonant cavity.Described resistance filter element cavity can make the frequency of the sound wave that passes through stagger mutually.
Described resistance filter element also comprises the gas channel of being arranged and being constituted by the first interleaved order of a plurality of insertion tubes, and described gas channel runs through above-mentioned resistance filter element cavity.
The insertion tube at the air inlet place of described gas channel is an inlet tube, the insertion tube at the place, gas outlet of described gas channel is an outlet, for fear of occurring passing through frequency, described inlet tube and described outlet insert 3/4ths and 1/3rd of above-mentioned resistance filter element cavity respectively.
Described impedance composite muffler can be by selecting suitable divergence ratio, and divergence ratio should be set to 6.00 to 6.50, and is preferred 6.35, reduces upper limit failure frequency.
Beneficial effect: the utility model organically combines reactive muffler and dissipative muffler, can adapt to the requirement of wider frequency range, resistive sound absorbing element has well been avoided fragile environment such as the high-temperature vapor, greasy dirt of resonant cavity, can various be to use on the generating set of power source with the internal combustion engine.
Description of drawings
Fig. 1 is the structural representation of the utility model impedance composite muffler.
Fig. 2 is the partial structurtes schematic diagram of the utility model impedance composite muffler.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
See figures.1.and.2, described impedance composite muffler comprises the resistance filter element, the resistance filter element is provided with a plurality of insertion tubes 9, resonant cavity and plural number joint expansion chambers, the gas channel that a plurality of insertion tube 9 the first interleaved order are arranged and are interconnected and constitute communicates with resonant cavity and expansion chambers by the aperture 4 above a plurality of insertion tubes 9.Resistive sound absorbing element 7 is housed at least one joint expansion chambers, can only resistive sound absorbing element 7 be housed in the minor details expansion chambers, also can resistive sound absorbing element 7 be housed in other expansion chambers.Resistive sound absorbing element can be the existing resistive sound absorbing element that utilizes resistive sound absorption materials such as glass fiber, mild steel silk screen, felt to make.
Resonant cavity and plural number joint expansion chambers begin to connect successively from resonant cavity by dividing plate 5, seal both ends open by end-plate 2, form a resistance filter element cavity.The insertion tube at the air inlet place of gas channel is an inlet tube 3, and the insertion tube at the place, gas outlet of described gas channel is an outlet 8, and described inlet tube 3 and described outlet 8 insert 3/4ths and 1/3rd of described resistance filter element cavity respectively.The outlet side of the inlet end of described inlet tube 3 and described outlet 8 is provided with and is used for the flange 1 that is connected with external pipe.For better high temperature resistant, the outer shell 6 that can serve as a contrast a thermal insulation of described expansion chambers.
In order to reduce upper limit failure frequency, the divergence ratio of described impedance composite muffler is 6.35.
Impedance composite muffler can improve acoustical absorptivity by the resistive sound absorbing element of further increase.
Impedance composite muffler can improve acoustical absorptivity by the number of further increase insertion tube and expansion chambers.
Impedance composite muffler can be according to the difference of sound source characteristic, the actual difference that requires, and suitable adjustment divergence ratio improves acoustical absorptivity.
More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1. impedance composite muffler comprises resistive sound absorbing element, it is characterized in that, also comprises a resistance filter element, and described resistance filter element comprises plural number joint expansion chambers, at least one joint expansion chambers resistive sound absorbing element is housed.
2. impedance composite muffler according to claim 1 is characterized in that, described resistance filter element also is provided with resonant cavity and plural number joint expansion chambers, and resonant cavity and plural number joint expansion chambers begin to be connected into successively a resistance filter element cavity from resonant cavity.
3. impedance composite muffler according to claim 2 is characterized in that, described resistance filter element also comprises the gas channel of being arranged and being constituted by the first interleaved order of a plurality of insertion tubes, and described gas channel runs through described resistance filter element cavity.
4. impedance composite muffler according to claim 3, it is characterized in that, the insertion tube at the air inlet place of described gas channel is an inlet tube, the insertion tube at the place, gas outlet of described gas channel is an outlet, and described inlet tube and described outlet insert 3/4ths and 1/3rd of described resistance filter element cavity respectively.
5. impedance composite muffler according to claim 1 is characterized in that, the divergence ratio of described impedance composite muffler is 6.00 to 6.50.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201520713U CN201266868Y (en) | 2008-08-15 | 2008-08-15 | Impedance composite type noise reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201520713U CN201266868Y (en) | 2008-08-15 | 2008-08-15 | Impedance composite type noise reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201266868Y true CN201266868Y (en) | 2009-07-01 |
Family
ID=40833237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201520713U Expired - Fee Related CN201266868Y (en) | 2008-08-15 | 2008-08-15 | Impedance composite type noise reducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201266868Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871473A (en) * | 2010-06-09 | 2010-10-27 | 中国矿业大学 | Impedance composite muffler |
| GB2568055A (en) * | 2017-11-02 | 2019-05-08 | Brush Elec Machines | Air outlet sound absorber for a rotating electrical machine |
-
2008
- 2008-08-15 CN CNU2008201520713U patent/CN201266868Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871473A (en) * | 2010-06-09 | 2010-10-27 | 中国矿业大学 | Impedance composite muffler |
| GB2568055A (en) * | 2017-11-02 | 2019-05-08 | Brush Elec Machines | Air outlet sound absorber for a rotating electrical machine |
| GB2568055B (en) * | 2017-11-02 | 2023-02-01 | Brush Elec Machines | Air outlet sound absorber for a rotating electrical machine |
| US11715992B2 (en) | 2017-11-02 | 2023-08-01 | Brush Electrical Machines Limited | Air outlet sound absorber for a rotating electrical machine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205349476U (en) | Diesel engine noise eliminator | |
| CN102606269B (en) | Impedance composite muffler | |
| CN104948263B (en) | One kind expansion resonance composite muffler | |
| CN2921306Y (en) | Impedance composite noise silencer | |
| CN102536386A (en) | Structurally modified automobile exhaust muffler assembly | |
| CN106401697B (en) | A kind of diesel generating set composite muffler | |
| CN102230407A (en) | Resistance-and-reactance-compounded exhaust silencer | |
| CN104500178B (en) | A kind of complex muffler preventing and treating diesel generating set low-frequency noise | |
| CN210829439U (en) | Low-flow-resistance broadband composite gas circuit silencer | |
| CN201266868Y (en) | Impedance composite type noise reducer | |
| EP1908930A3 (en) | Exhaust silencer for automotive vehicles | |
| CN207064040U (en) | A kind of efficient automobile is vented silencing apparatus | |
| RU102682U1 (en) | SILENCER-NEUTRALIZER EXHAUST EXHAUST GASES OF INTERNAL COMBUSTION ENGINE | |
| CN201723280U (en) | Straight-pipe resistance muffler | |
| CN111503410A (en) | Helmholtz type silencer | |
| CN112610300A (en) | Low-flow-resistance broadband composite gas circuit silencer | |
| CN206487543U (en) | A kind of diesel-driven generator exhaust silencer system | |
| CN201502421U (en) | Anti-noise structure for motor of diesel generator | |
| CN212202181U (en) | Diesel generator exhaust amortization structure | |
| CN204476531U (en) | A kind of motorcycle exhaust outlet pipe | |
| CN211116192U (en) | Spiral air flue silencer | |
| CN207279667U (en) | A kind of boiler of power plant chimney silencer | |
| CN207634893U (en) | A kind of winding type pipeline silencer | |
| CN203532005U (en) | Engine silencer used on fracturing equipment | |
| RU111195U1 (en) | SILENCER-NEUTRALIZER EXHAUST EXHAUST GASES OF INTERNAL COMBUSTION ENGINE |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090701 Termination date: 20110815 |